After Nexplanon is removed, the hormone it releases clears from your bloodstream within about a week. The active hormone has an elimination half-life of roughly 25 hours, meaning your body reduces the amount by half approximately every day. Within five to seven days, levels drop low enough that pregnancy becomes possible.
How Your Body Clears the Hormone
Nexplanon works by continuously releasing a synthetic progestin called etonogestrel through a small rod implanted under the skin of your upper arm. While the implant is in place, it delivers a steady stream of hormone directly into your bloodstream. At the start of use, that release rate is about 60 to 70 micrograms per day. By the end of year three, it tapers to roughly 25 to 30 micrograms per day.
Once the rod is physically removed, the source of hormone is gone. Your liver breaks down the remaining etonogestrel using the same enzyme system it uses to process many other medications. With a half-life of about 25 hours, the hormone concentration drops rapidly: roughly half is gone after one day, three-quarters after two days, and so on. By one week post-removal, circulating levels are negligible.
When Fertility Returns
Because the hormone clears so quickly, fertility can bounce back almost immediately. The manufacturer states that pregnancy is possible as early as one week after removal. Most people ovulate within the first one to three menstrual cycles, though for some it happens even sooner. If you’re having the implant removed and don’t want to get pregnant, you’ll need another method of contraception in place right away, ideally the same day.
This rapid return to fertility is one of the features that distinguishes the implant from some other long-acting methods. Unlike injectable contraceptives, which can delay ovulation for several months after the last shot, the implant leaves no residual hormone depot in your body once the rod comes out.
What Removal Feels Like Afterward
The physical removal is a brief in-office procedure involving a small incision and local anesthetic. Bruising at the removal site is common and typically fades within a week or two.
As hormone levels drop over the following days, some people notice changes similar to what happens when stopping other hormonal birth control. Withdrawal bleeding, often resembling a light period, tends to show up within the first week. Side effects you may have experienced while on the implant, such as headaches, mood shifts, breast tenderness, or bloating, generally fade quickly once the hormone is out of your system. Your natural menstrual cycle will gradually re-establish itself, though the timing varies from person to person.
How Long the Implant Itself Lasts
Nexplanon was originally approved for three years of use. At the three-year mark, it still releases enough hormone to suppress ovulation, but levels are at their lowest. A clinical study following over 200 women who kept their implants for five years found zero pregnancies during years four and five, with a cumulative pregnancy rate of just 0.6 per 100 women-years over the full five-year period. Based on data like this, the FDA has extended the approved duration to five years.
Even with this extended window, the implant does eventually lose its contraceptive effectiveness. If left in place past its approved lifespan, hormone output continues to decline and the risk of unintended pregnancy rises. The rod itself won’t cause harm sitting in your arm, but it also won’t reliably prevent pregnancy once it’s past its effective life. Replacement or removal on schedule keeps you protected.
Factors That Could Affect Clearance
Because etonogestrel is processed by a specific liver enzyme pathway, anything that affects liver function could theoretically influence how fast you clear the hormone. Certain medications, particularly some anti-seizure drugs and antibiotics, speed up that enzyme activity and could cause the hormone to be broken down faster, both while the implant is in and after removal. Body weight doesn’t meaningfully change how long the hormone lingers after the rod is removed, since the half-life stays roughly the same regardless of weight. In practical terms, for the vast majority of people, the one-week clearance window holds.